Year 2023

Week # 3 Quiz 3

Q1. Find the output voltage in the following circuit:

Q2.  In voltage divider bias, \(V_{CC} = 25\: V;\: R_1 = 10\: k\Omega;\: R_2 = 3.3 \: k\Omega; \:R_C = 2 \: k\Omega;\) and \(R_E =1\: k\Omega\). What is the collector current?

Q3. Let a typical audio amplifier have a transfer function \(G(j\omega) = 10 / (1 + j\omega/100)\)

Q4.  In voltage divider bias, \(V_{CC} = 20\: V;\: R_1 = 10\: k\Omega;\: R_2 = 3.3 \: k\Omega; \:R_C = 3 \: k\Omega;\) and \(R_E =1.5\: k\Omega\). What is the emitter voltage?

Q5. Choose the correct match for input resistance of various amplifier configurations shown below: $$\begin{array} {|r|r|}\hline CB : Common\: Base & LO : Low \\ \hline CC : Common \:Collector & MO : Moderate \\ \hline CE : Common\: Emitter & HI : High \\ \hline \end{array}$$

Q6. In a transistor, signal is transferred from

Q7. For a transistor connected in common base connection, collector current is 0.95 mA and base current is 0.05 mA. Find the value of \(\alpha\):

Q8. A non inverting amplifier is nulled at 25 ºC with a gain of 100. Calculate the output voltage when the temperature rises to 50 ºC for an offset drift voltage of 0.15 mV/ ºC.

Q9. An amplifier without feedback has a voltage gain of 60, input resistance of \(5\:K\Omega\) & Output resistance of \(2\:K\Omega\). The input resistance of the current-shunt negative feedback amplifier using the above amplifier with a feedback factor of 0.2 is

Q10. The positive clipper can be easily converted into a negative clipper by